Smoke eliminator



Ocft 7, 1941-` c. E. ALEXANDER SMOKE ELIMINATOR 2 Sheets-Sheet l FiledNOV. 19, 1940 A( Inventor 7%?5 /OA/awl By I omey 0ct. 7, 1941e c3. E.ALEXANDER 2,257,931

SMOKE ELIMINATOR Filed Nov. 19, 1940 2 Sheets-Sheet 2 zdf/@S f. km77/971Patented Oct. 7, 1941 SMOKE ELIMINATOR Charles E. Alexander, Alton,llll., assigor of One-half t John E. BylleS, A111011, Ill.

Application November 19, 1940,V Serial No. 366,296 (c1. 11e-9:7)

4 Claims.

This invention relates to a smoke eliminator and heat conserveradaptable to various types of furnaces constructed to use coal as a fueland principally bituminous coal, and has for the primary object theprovision of means easy to install in a furnace and which willconcentrate the gases and smoke under high temperature and increase thedistance of travel thereof before reaching the smoke pipe of thefurnace, so that complete burning of the' gases will be assuredproviding for a maximum amount of heat derived from the fuel with asubstantial elimination of smoke passingfrom the furnace by way of thesmoke pipe, besides retarding the passing of the heat from the furnaceby way of said smoke pipe.

With these and other objects in view as will become more apparent as thedescription proceeds, the invention consists in certain novel featuresof construction, combination and arrangement of parts as will behereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had tothe following description and accompanying drawings, in which Figure lis a vertical sectional View illustrating a furnace of a conventionalconstruction equipped with the present invention and showing the smokestack of the furnace connected to a chimney and provided with a forceddraft means.

Figure 2 is a sectional view taken on the line 2--2 of Figure 1.

Figure 3 is a sectional View taken on the line 3--3 of Figure 1.

Figure 4 is a fragmentary front elevation illustrating a part of thefuel door of the furnace equipped with oxygen supply tubes.

Referring in detail to the drawings, the numeral 5 indicates as anentirety a furnace of any well known construction equipped with theusual grate E and fire door 1. The smoke pipe of the furnace isindicated by the character 8 and is shown as connected to the upperportion of the furnace and to a chimney 9. Mounted on the smoke pipe 8is a power driven fan I0, the exhaust pipe I I of which is connected tothe smoke pipe 8 adjacent the latters connection to the chimney 9. Thepurpose of the fan is to create a forced draft in the furnace so thatthe fuel will be burnt under forced draft.

An arch or dome I2 is mounted in the furnace by brackets I3 at aselected distance above the grate 6 and establishes in the furnace afire box designated by the character A which may be supplied with fuelthrough the doorway normally closed by the door 1. The arch or dome I2snugly fits the walls of the furnace and is pro'- vided with a centrallyarranged opening I4 through which gases and other products of comebustio'ri of the burning coal on the grate may pass into the upperportion of the furnace. The arch or dome consists of a metallic plate`I5 and fire bricks I6 covering the upper face thereof.Y The metallicplate is concave convex in shape with the concaved face disposedlowermo'st acting to direct the rising gases and products of combus-Vtion toward the opening I4 for passage therethrough and therebyconcentrating the gases and products'of combustion centrally in theupper portion of the furnace.

An upwardly inclined baille or deflector plate Il is mounted on the wallof the furnace 5 a selected distance above the arch or dome and betweenthe latter and the smoke pipe 8. The baffle or de'e'ct'orplate I1terminates a limited distance beyond the opening I4 so that the gasesand products of combustion rising upwardly from said opening will bedeflected toward the side of the furnace having the fire door and awayfrom the entrance to the smoke pipe, consequently requiring the gasesand products of combustion to travel a greater distance before reachingthe smoke pipe and within a concentrated area designated by thecharacter B and termed a combustion chamber.

A baffle I8 is mounted on the furnace directly above the fire door 'Ifor pivotal movement and may be sustained in any of its adjustedpositions by a suitable means indicated by the character I9 arrangedexteriorly of the furnace. The baffle I8 terminates in a plane below theupper end of the baille or deflector plate I1. It is also to be notedthat the baffle I8 inclines downwardly over the fire door which isequipped with tubes 20 for the admittance of air to the combustionchamber which assists in the burning of the gases and products o-fcombustion therein.

The directing of the gases and products of combustion from the burningfuel to the center of the furnace by the arrangement of the dome or archI2 and the passing of said gases and products of combustion centrallyinto the combustion chamber will assure the burning thereof under a hightemperature and consequently assure the complete consumption tosubstantially eliminate smoke passing from the furnace by wayv of thesmoke pipe.

The arrangement of the deector plate Il and the baffle I8 will retard orslow up the passing of heat from the furnace by way of the smoke pipe,consequently permittingv a maximum amount of heat to be derived from theburning fuel Within the furnace.

'I'he baille or deector plate I'l consists of a metallic plate element22 supporting on its upper face re bricks 23.

While I have shown and described the preferred embodiment of myinvention, it will be understood that minor changes in construction,combination and arrangement of parts may be made without departing fromthe spirit and scope of the invention as claimed.

Having thus described the invention, what I claim is:

1. In combination with a furnace having a fire box and fuel doortherefor and a smoke pipe connected with said furnace above the firebox, forced draft means connected to said smoke pipe, an arch mounted inthe fire box and snugly fitting the walls of the furnace and providedwith a centrally arranged opening to permit escape of gases and productsof combustion from the burning -fuel within the fire box, said fuel doorbeing located above and below said arch,

2. In combination with a furnace having a fire box and fuel doortherefor and a smoke pipe connected with said furnace above the firebox, forced draft means -connected to said smoke pipe, an arch mountedin the fire box and snugly fitting the walls of the furnace and providedwith a centrally arranged opening to permit escape of gases and productsof combustion from the burning fuel within the fire box, said fuel doorbeing located above and below said arch, vent tubes carried by said fueldoor to discharge oxygen into the furnace above the arch.

3. In combination with a furnace having a fire box and fue] doortherefor and a smoke pipe connected with said furnace above the lirebox, forced draft means connected to said smoke pipe, an arch mounted inthe fire box and snugly tting the walls of the furnace and provided witha centrally arranged opening to permit escape of gases and products ofcombustion from the burning fuel within the re box, said fuel door beinglocated above and below said arch, vent tubes carried by said fuel doorto discharge oxygen into the furnace above the arch, and a baffle platemounted on one side of the furnace between the arch and the smoke pipeand inclining upwardly and terminating beyond the opening of the arch,said baille plate and arch coacting with the furnace in establishingtherein a combustion chamber with the vent tubes communicatingtherewith.

4. In combination with a furnace having a fire box and fuel doortherefor and a smoke pipe connected with said furnace above the flrebox, forced draft means connected to said smoke pipe, an arch mounted inthe fire box and snugly tting the walls of the furnace and provided witha centrally arranged opening to permit escape of gases and products ofcombustion from the burning fuel within the fire box, said fuel doorbeing located above and below said arch, vent tubes carried by said fueldoor to discharge oxygen into the furnace above the arch, and a bailleplate mounted on one side of the furnace between the arch and the smokepipe and inclining upwardly and terminating beyond the opening of thearch, said baille plate and arch coacting with the furnace inestablishing therein a combustion chamber with the vent tubescommunicating therewith, and a pivotally mounted baille located on theside of the furnace above the door and inclining downwardly andterminating in a plane below the upper end of the baille plate andspaced therefrom, and means for sustaining the pivoted baille in any ofits adjusted positions.

CHARLES E. ALEXANDER.

